1 /*
  2  * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
  3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  4  *
  5  * This code is free software; you can redistribute it and/or modify it
  6  * under the terms of the GNU General Public License version 2 only, as
  7  * published by the Free Software Foundation.
  8  *
  9  * This code is distributed in the hope that it will be useful, but WITHOUT
 10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 12  * version 2 for more details (a copy is included in the LICENSE file that
 13  * accompanied this code).
 14  *
 15  * You should have received a copy of the GNU General Public License version
 16  * 2 along with this work; if not, write to the Free Software Foundation,
 17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 18  *
 19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 20  * or visit www.oracle.com if you need additional information or have any
 21  * questions.
 22  */
 23 
 24 // Defines the classes used by StrictFields.java to check verification
 25 // of strict fields.
 26 
 27 // StrictIgnore is an earlier classfile version for which strict must be ignored
 28 // so we can write to it multiple times in the constructor.
 29 public class StrictIgnore version 66:0 {
 30   final strict Field x:I;
 31 
 32   public Method "<init>":"()V" stack 2 {
 33       aload_0;
 34       iconst_1;
 35       putfield x:I;
 36       aload_0;
 37       invokespecial Method java/lang/Object."<init>":"()V";
 38       aload_0;
 39       iconst_1;
 40       putfield x:I;
 41       return;
 42    }
 43 }
 44 
 45 // StrictBase is a well formed value class with a strict field, that can
 46 // be used for subclassing.
 47 public abstract class StrictBase version 69:65535 {
 48   protected final strict Field x:I;
 49 
 50   public Method "<init>":"()V" stack 2 {
 51       aload_0;
 52       iconst_1;
 53       putfield x:I;
 54       aload_0;
 55       invokespecial Method java/lang/Object."<init>":"()V";
 56       return;
 57    }
 58 }
 59 
 60 // PostInitStrict is a bad value class that writes to a strict field after the
 61 // super constructor call.
 62 public final class PostInitStrict version 69:65535 {
 63   final strict Field y:I;
 64 
 65   public Method "<init>":"()V" stack 2 {
 66       aload_0;
 67       invokespecial Method java/lang/Object."<init>":"()V";
 68       aload_0;
 69       iconst_1;
 70       putfield y:I;
 71       return;
 72    }
 73 }
 74 
 75 // BadStrictSubPreInit is a bad value class that tries to write to an inherited
 76 // strict field while acting on UninitializedThis.
 77 public final class BadStrictSubPreInit extends StrictBase version 69:65535 {
 78 
 79   public Method "<init>":"()V" stack 2 {
 80       aload_0;
 81       iconst_1;
 82       putfield x:I;
 83       aload_0;
 84       invokespecial Method StrictBase."<init>":"()V";
 85       return;
 86    }
 87 }
 88 
 89 // BadStrictSubPostInit is a bad value class that tries to write to an inherited
 90 // strict field in "regular" code.
 91 public final class BadStrictSubPostInit extends StrictBase version 69:65535 {
 92 
 93   public Method "<init>":"()V" stack 2 {
 94       aload_0;
 95       invokespecial Method StrictBase."<init>":"()V";
 96       aload_0;
 97       iconst_1;
 98       putfield x:I;
 99       return;
100    }
101 }